Loan Servicing Rights - LSRs Activity (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Activity for loan servicing rights and the related fair value changes
Fair value, beginning of period	$ 71,013	$ 63,841
Additions from loans sold with servicing retained	2,133	1,967
Changes in fair value due to:
Reductions from pay-offs, pay downs and run-off	(799)	(723)
Changes in estimates of fair value	(7,646)	3,752
Fair value, end of period	64,701	68,837
Principal balance of loans serviced	6,856,606	7,060,339
Commercial Real Estate
Activity for loan servicing rights and the related fair value changes
Fair value, beginning of period	451	427
Additions from loans sold with servicing retained	138	43
Changes in fair value due to:
Reductions from pay-offs, pay downs and run-off	(30)	(29)
Changes in estimates of fair value	0	0
Fair value, end of period	559	441
Principal balance of loans serviced	45,719	42,032
Mortgage
Activity for loan servicing rights and the related fair value changes
Fair value, beginning of period	70,562	63,414
Additions from loans sold with servicing retained	1,995	1,924
Changes in fair value due to:
Reductions from pay-offs, pay downs and run-off	(769)	(694)
Changes in estimates of fair value	(7,646)	3,752
Fair value, end of period	64,142	68,396
Principal balance of loans serviced	$ 6,810,887	$ 7,018,307

The value of the principal balance outstanding on loans sold to a third party and serviced by the company.

No definition available.

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- Definition

The value of new servicing assets from transfers, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets.

+ References

No definition available.

+ Details

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- Definition

Servicing Asset At Fair Value, Changes In Fair Value [Abstract]

+ References

No definition available.

+ Details

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- Definition

The net increase (decrease) in fair value as a result of reductions from loans paid off used to calculate the fair value of servicing assets.

+ References

No definition available.

+ Details

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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746

+ Details

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

Amount of increase (decrease) in fair value from changes in the inputs, assumptions, or model used to calculate the fair value of the contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(4)(i)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746

+ Details

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